Answer:
abiotic and biotic factors
Explanation:
According to the evolutionary theory proposed by Darwin, natural selection can be defined as the mechanism by which evolution occurs (i.e., the mechanism by which species change over time). An organism´s environment is comprised of abiotic (e.g., temperature, light, water, etc) and biotic (e.g., microbes, food availability, etc) factors. Adaptations refer to the phenotypic traits that increase the chance of survival and reproduction of an organism in its environment. Organisms better adapted to their environment are selected by natural selection to reproduce and thus perpetuate their genes across generations.
a. 21. Angiosperms produce flowers, while gymnosperms do not. Which is a property of the flowers of angiosperms that is not shared by the reproductive structures of gymnosperms?
A. flower can produce many seeds at the same time.
b. The same plant can produce many flowers.
C. Flowers can be pollinated without the involvement of animals.
d. Flowers produce seeds that are encased in protective fruits
Answer:
Its not a flower can produce many seeds at the same time
Explanation:
D. Flowers produce seeds that are encased in protective fruits is a property of the flowers of angiosperms that is not shared by the reproductive structures of gymnosperms.
What are gymnosperms?Gymnosperms are a group of seed-bearing plants that produce seeds that are not enclosed within a fruit. They are found in a wide range of habitats, from deserts to mountainous regions, and include many well-known species such as pine, spruce, and fir trees.
Gymnosperms are an ancient group of plants that have been around for over 300 million years, and they play an important role in many ecosystems by providing habitat, food, and other resources for wildlife and humans.
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Prokaryotic cells do not have a distinct nucleus and are missing other organelles. This is a characteristic of which domains?
Help me!!!!!
Answer: Eukaryotes
Explanation:
Eukaryotes have membrane bound organelles like nuclei. Arcahea and Prokaryotes don't have memrbane bound organelles
Which of the following has to be "tailed" before it migrates to the cytoplasm?
Group of answer choices, pick one:
mRNA
tRNA
pre-mRNA
rRNA
Pre-mRNA has to be "tailed" before it migrates to the cytoplasm, option C is correct.
Pre-mRNA is the initial transcript synthesized during transcription in eukaryotic cells. Before it can be transported from the nucleus to the cytoplasm for translation, the pre-mRNA molecule undergoes a process called RNA processing or RNA splicing. This process involves the removal of non-coding regions called introns and the joining together of coding regions called exons. Once the pre-mRNA has undergone splicing, it is converted into mature mRNA, which can then be transported to the cytoplasm for translation.
Pre-mRNA processing is a crucial step in gene expression regulation in eukaryotic cells. After transcription, the pre-mRNA molecule contains both introns and exons. Introns are non-coding regions that do not contain instructions for protein synthesis, while exons are the coding regions that contain the protein-coding sequences, option C is correct.
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The complete question is:
"Which of the following has to be ""tailed"" before it migrates to the cytoplasm?Group of answer choices, pick one:
A.mRNA
B.tRNA
C.pre-mRNA
D.rRNA"
what is the correct answer?
Answer:
Purple. Phenotype=visual characteristics
The products or photosynthesis are carbohydrates and oxygen. Which process uses these substances as reactants?
Answer:
Respiration is the correct answer. Respiration process that occurs in the presence of oxygen is called aerobic respiration, generally seen among humans.
Explanation:
which cellular processes would be directly affected by the improper functioning of mitochondria
Answer:
Cellular respiration
Explanation:
The Krebs cycle takes place in the mitochondria, so if the mitochondria wasn't able to function correctly, cellular respiration would be unable to take place.
Many of the cell's hydrolytic enzymes are located in the lysosome, where the pH is ~5. a) What would you expect to be the optimum pH for these enzymes? b) Explain why this specific pH optimum would have a protective effect on the rest of the cell. c) Explain how this principle can be used to regulate enzyme activity in vitro.
a) Optimum pH for lysosomes hydrolytic enzymes is approximately 5.
b) pH 5 in lysosomes protects the rest of the cell by limiting enzyme activity outside the lysosome.
c) In vitro, enzyme activity can be regulated by adjusting pH, providing control over enzymatic reactions.
a) The optimum pH for hydrolytic enzymes in the lysosome would be around 5, as they are adapted to function effectively in this acidic environment.
b) The specific pH optimum of 5 in lysosomes helps protect the rest of the cell because it creates a barrier that prevents the enzymes from functioning optimally outside the lysosome, reducing the risk of uncontrolled hydrolytic activity that could damage cellular components.
c) In vitro, enzyme activity can be regulated by adjusting the pH of the surrounding solution. By setting the pH to the optimum level of the specific enzyme, its activity can be enhanced or inhibited, allowing precise control over the enzymatic reactions for experimental or therapeutic purposes.
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scientists originally believed that intelligence was located in the _____ of the brain.
Answer: Frontal lobe
Explanation:
Complete the sequences below: A T G C T A A C C T G C
DNA sequence: ______
mRNA sequence: ______
Amino Acids: ______
Answer:
DNA: A = T and T = A. C = G and G = C
T A C G A T T G G A C G
mRNA: A = T and T = U . C = G and G = C
T U C G U T T G G U C G
Amino Acids:
A = Adenine
T = Thymine
G = Guanine
C = Cytosine
U = Uracil
What is the function of the flower of a plant?
7. During DNA replication, a complementary strand of DNA is made for each original DNA strand. Thus,
if a portion of the original strand is CAGGTTACG, then the new strand will be
a. CAGGTTACG.
c. GTCCAATGC.
b. GTCCTTAGC.
d. GTCCTTACG.
Answer:
i think its b i took the test but i forgot the answer
Explanation:
What does condensation release into the atmosphere?
Answer:
Condensation is the change of water from its gaseous form (water vapor) into liquid water. Condensation generally occurs in the atmosphere when warm air rises, cools and looses its capacity to hold water vapor. As a result, excess water vapor condenses to form cloud droplets.
Explanation:
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Agriculture is the main sources
lincome of Nepal Justify
this statments
give me long answer
Answer:
Agriculture is the mainstay of the economy, providing a livelihood for more than 70% of the population and accounting for a little over one-third of GDP,” according to the CIA. “Industrial activity mainly involves the processing of agricultural products, including pulses, jute, sugarcane, tobacco, and grain.
15. Cells found in plants and animals have similarities but can differ in function. Consider the following two organisms: a corn plant cell (Zea mays) and a camel cell (Bactrianus ferus). What is the best explanation for the difference in the cellular vacuole size between these two biotic organisms?
A. The corn cells' have a small vacuole size because it does not need long term water and
electrolyte storage.
B. The camel cells' have a small vacuole size because it does not need long term water and electrolyte storage.
C. The camel cells' have a small vacuole size because it is not in contact with toxins that need to be removed from the cell.
D. The corn cells' have a large vacuole size because it is in contact with many toxins in the soil which need to be removed from the cell.
The best explanation for the difference in the cellular vacuole size is option d. The corn cells' have a large vacuole size.
Explanation to the difference in the cellular vacuole size:When there is the difference in the vacuole size that lies between the two biotic organism so it is due to the corn cells that contain high vacuole since they are in contact with various toxins in the soil that need to be eliminated from the cell.
hence, the correct option is d.
And, the rest of the options are wrong.
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How does weathering of rock expanding and breaking rocks apart impact water quality?
answer asap please
thanks
Which of the following molecules of RNA would you predict to be the most likely to fold into a specific structure as a result of intramolecular base-pairing?
Group of answer choices
5′-CCCUAAAAAAAAAAAAAAAAUUUUUUUUUUUUUUUUAGGG-3′
5′-UGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUG-3′
5′-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA-3′
5′-GGAAAAGGAGAUGGGCAAGGGGAAAAGGAGAUGGGCAAGG-3′
The molecule: 5′-GGAAAAGGAGAUGGGCAAGGGGAAAAGGAGAUGGGCAAGG-3′ is the most likely to fold into a specific structure as a result of intramolecular base-pairing, option D is correct.
This is because it contains complementary regions that can form stable base pairs. Specifically, the sequence contains several repeated stretches of the nucleotide G, followed by A, forming G-A base pairs.
These repeated motifs increase the likelihood of stable base pairing interactions and formation of secondary structures, such as stem-loop structures. In contrast, molecules A, B, and C lack repeated motifs or complementary regions, making it less likely for them to form specific structures through intramolecular base-pairing, option D is correct.
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The complete question is:
Which of the following molecules of RNA would you predict to be the most likely to fold into a specific structure as a result of intramolecular base-pairing?
A) 5′-CCCUAAAAAAAAAAAAAAAAUUUUUUUUUUUUUUUUAGGG-3′
B) 5′-UGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUG-3′
C) 5′-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA-3′
D) 5′-GGAAAAGGAGAUGGGCAAGGGGAAAAGGAGAUGGGCAAGG-3′
ere are 5 sacral vertebrae that are fused into ____________ sacrum.There are ____________ cervical vertebrae, some of them containing a transverse foramen.There are ____________ thoracic vertebrae, most of them with a long spinous process.The vertebral column is composed of ____________ vertebrae distributed into 5 regions.There are ____________ to 5 bones in the coccyx, with variability in the fusion.There are ____________ lumbar vertebrae, which have large verte
Answer:
There are 5 sacral vertebrae that are fused into one sacrum. There are seven cervical vertebrae, some of them containing a transverse foramen. There are twelve thoracic vertebrae, most of them with a long spinous process. The vertebral column is composed of thirty-three vertebrae distributed into 5 regions. There are three to 5 bones in the coccyx, with variability in the fusion. There are five lumbar vertebrae, which have large vertebral bodies.
Explanation:
The vertebral column has 33 vertebras and five sections. They are the cervical spine with seven vertebrae, the thoracic spine with twelve vertebrae, the lumbar spine with five vertebrae, the sacrum with five fused vertebrae, and lastly, the coccyx with three to five vertebrae. The vertebrae in each section have different characteristics. For example, the length of the spinous process changes becoming longer as we descend in the cervical and the thoracic spine, or the body of the vertebrae has different shapes in each section, or the presence of the transverse foramen in the cervical spine, which allow the passage of a nerve plexus, an artery, and a vein. Each section, with its characteristics, aligns to form the vertebrae column containing and protecting the spinal cord.
a random urine specimen and plasma glucose test that are to be drawn and collected at the same time can be used to confirm:
Transport is the function of the protein known as hemoglobin . State the name and function of another protein. Do not use enzymes or membrane proteins for your answer . Name :
Answer:
keratin.
Explanation:
keratin is a fibrous protein that has protective and structural functions in the body.
to fulfil it's functional necessities keratin has characteristics that makes it insoluble and repellent to damage.
to fulfil it's functional necessities keratin has characteristics that makes it insoluble and repellent to damage.in the human body, keratin can be present in - hair and finger nails.
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Which best describes a method of obtaining energy that may cause changes in water temperature and harm to fish populations?
Do you think new helpful species of bacteria will evolve with different functions? What would they do? What traits could they have to help them do these things?
please help
i will give brainliest and 5 * and 10 points for the best answer
i don't want to see any link as an answer
if i do you will be reported
DNA double helix. Hydrogen bonds break and helix opens. Each strand of DNA acts as a template for synthesis of a new, complementary strand. Replication produces two identical DNA double helices, each with one new and one old strand.
Answer:
The process described above is known as DNA replication.
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All of the following adaptations allow for reproduction on land except
external fertilization.
eggs with sufficient food supply.
desiccation-resistant eggs.
amniotic eggs.
External fertilization (a) is the adaptation that does not allow for reproduction on land, while the other adaptations listed (b, c, d) enable successful reproduction in terrestrial environments.
The adaptation that does not allow for reproduction on land is a. external fertilization. External fertilization refers to the process of fertilization that occurs outside the body, typically in aquatic environments. This method is commonly observed in many aquatic organisms, where eggs and sperm are released into the water, and fertilization takes place externally.
On the other hand, the remaining adaptations listed (b. eggs with sufficient food supply, c. desiccation-resistant eggs, and d. amniotic eggs) are all adaptations that enable reproduction on land.
b. Eggs with sufficient food supply: Land-dwelling organisms, such as reptiles and birds, produce eggs with a sufficient food supply to support the developing embryo. These eggs contain nutrients and protective structures that allow for successful development outside of water.
c. Desiccation-resistant eggs: Many terrestrial organisms, including insects and amphibians, have evolved desiccation-resistant eggs. These eggs have specialized membranes and structures that prevent them from drying out in dry environments, enabling them to survive and develop on land.
d. Amniotic eggs: Amniotic eggs are a defining feature of reptiles, birds, and monotremes. These eggs have a specialized protective membrane called the amnion, which surrounds the developing embryo and provides a stable internal environment. This adaptation allows for the development and hatching of embryos on land.
Overall, external fertilization (a) is the adaptation that does not allow for reproduction on land, while the other adaptations listed (b, c, d) enable successful reproduction in terrestrial environments.
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estimate how many calories a
person burns from physical activity.
Answer:
For men: 66 + (6.2 x weight) + (12.7 x height) – (6.76 x age)
For women: 655.1 + (4.35 x weight) + (4.7 x height) – (4.7 x age)
Explanation:
"In fruit flies, eye color is a sex-linked trait: Red is dominant to white. What are the sexes and eye colors of flies with the following genotypes: XRX' XRY- XX: XRXR: d. XY: What are the genotypes of these flies: White eyed male: White eyed, female: red eyed female (heterozygous): d. red eyed_ male: Show the cross of a white eyed female XX' with red eyed male XRY. Show cross between pure red eyed female and white eyed male What are the genotypes of the parents How may are= White eyed and male: White eyed and female: Red eyed and male: Red eyed and female:"
The genotypes and eye colors of the flies are as follows:
XRX' and XRY: Red-eyed male and female, respectively.
XX: Red-eyed female.
XRXR: Red-eyed male.
XY: White-eyed male.
The genotypes of the parents in the crosses are:
1. White-eyed female (XX') and red-eyed male (XRY).
2. Pure red-eyed female and white-eyed male.
The number of flies with each eye color and sex cannot be determined without additional information or the specific inheritance pattern of the traits.
To determine the sexes and eye colors of fruit flies with the given genotypes, we need to understand the sex-linked inheritance of eye color in fruit flies.
X represents the X chromosome, and Y represents the Y chromosome, which determines the sex of the flies. The prime symbol (') denotes the mutant version of the gene.
Given genotypes:
1. XRX': This represents a red-eyed female.
2. XRY: This represents a red-eyed male.
3. XX: This represents a female with an unknown eye color.
4. XRXR: This represents a red-eyed female.
5. XY: This represents a male with an unknown eye color.
To determine the genotypes of flies with specific eye colors:
1. White-eyed male: The genotype would be XrY.
2. White-eyed female: The genotype would be XrXr.
3. Red-eyed female (heterozygous): The genotype would be XRXr.
4. Red-eyed male: The genotype would be XRY.
For the crosses:
1. Cross between a white-eyed female XX' and a red-eyed male XRY:
Genotypes of parents: Female (XX') and male (XRY)
Offspring: All female offspring will be red-eyed (XRX') and all male offspring will be white-eyed (XrY).
2. Cross between a pure red-eyed female and a white-eyed male:
Genotypes of parents: Female (XRXR) and male (XrY)
Offspring: All female offspring will be red-eyed (XRXr) and all male offspring will be white-eyed (XrY).
To summarize the genotypes of the parents and their eye colors:
White-eyed and male: XrY
White-eyed and female: XrXr
Red-eyed and male: XRY
Red-eyed and female: XRXr
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a point mutation that changes a uac codon into a uag codon is a: missense mutation. nonsense mutation. silent mutation. frameshift mutation.
Answer: silent mutation
Explanation:
DNA undergoes ____to produce_____.RNA undergoes____to produce_____
I am not really sure but you can get the answer from it :
They discovered a fundamental mechanism of how proteins protect chromosomes while DNA is being copied (a process called DNA replication), which relies on a protein called RPA. Cells have a limited amount of this protein, which they use as 'band aids' to protect the DNA temporarily during replication.
On the African savanna, grasses feed wildebeest, gazelles, and hares. Lions, hyenas, and cheetahs hunt the wildebeest and gazelles. Vultures eat the remains from predator kills. Bacteria and fungi break down anything that is left over from the carcasses. Dung beetles eat the feces left behind from grass-eating animals like hares and elephants.
Which organism is a detritivore in this example?
Answer:
dung beetles
Explanation:
they reuse our waste for their needs
Which choice is involved in both sexual and asexual reproduction
Which best explains why viruses do not have special structures or enzymes that allow them to make their own food?
Viruses can use energy of living cells that they infect.
Viruses can replicate inside a host that they infect.
Viruses can cause contagious illnesses in host cells.
Viruses integrate their RNA or DNA into infected cells.
Answer:
Viruses can replicate inside a host that they infect. ... The epiglottis closes the air pathway so that food will not enter it.
Answer:
B.) Viruses can replicate inside a host that they infect.
Explanation:
I just finished this test and got it right. This was the answer for me